Black and decker cordless 2 in 1 (SVJ520BFS) error codes what meaning?

Hi!

I have an SVJ520BFS H1 hoover and when I put in the charger it starts blinking:

First, the filter sensor (Red) and BOOST mode (green light) flash 5 times together.

After :

3 times BOOST mode (green light) flash,

7 times BOOST mode (green light) flash,

8 times BOOST mode (green light) flash.

Other code:

the filter sensor (Red) and BOOST mode (green light) flash 5 times together.

After :

1 times BOOST mode (green light) flash,

3 times BOOST mode (green light) flash,

9 times BOOST mode (green light) flash.

And the circle starts again.

What does this code mean?

Thanks.